package com.hmdp.utils;


import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断是否需要拦截（ThreadLocal中是否有用户）
       if(UserHolder.getUser() == null) {///没有，需要拦截
           response.setStatus(401);
           return false;
       }
        return true;//由用户，放行
    }
}
